/*
 * Copyright (C) 2005-2011 MaNGOS <http://www.getmangos.com/>
 *
 * Copyright (C) 2008-2011 Trinity <http://www.trinitycore.org/>
 *
 * Copyright (C) 2010-2011 ArkCORE <http://www.arkania.net/>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

/** \file
 \ingroup Trinityd
 */

#include "Common.h"
#include "ObjectAccessor.h"
#include "World.h"
#include "WorldSocketMgr.h"
#include "Database/DatabaseEnv.h"
#include "ScriptMgr.h"
#include "BattlegroundMgr.h"
#include "MapManager.h"
#include "Timer.h"
#include "WorldRunnable.h"

#define WORLD_SLEEP_CONST 50

#ifdef _WIN32
#include "ServiceWin32.h"
extern int m_ServiceStatus;
#endif

/// Heartbeat for the World
void WorldRunnable::run() {
	uint32 realCurrTime = 0;
	uint32 realPrevTime = getMSTime();

	uint32 prevSleepTime = 0; // used for balanced full tick time length near WORLD_SLEEP_CONST

	sScriptMgr->OnStartup();

	///- While we have not World::m_stopEvent, update the world
	while (!World::IsStopped()) {
		++World::m_worldLoopCounter;
		realCurrTime = getMSTime();

		uint32 diff = getMSTimeDiff(realPrevTime, realCurrTime);

		sWorld->Update(diff);
		realPrevTime = realCurrTime;

		// diff (D0) include time of previous sleep (d0) + tick time (t0)
		// we want that next d1 + t1 == WORLD_SLEEP_CONST
		// we can't know next t1 and then can use (t0 + d1) == WORLD_SLEEP_CONST requirement
		// d1 = WORLD_SLEEP_CONST - t0 = WORLD_SLEEP_CONST - (D0 - d0) = WORLD_SLEEP_CONST + d0 - D0
		if (diff <= WORLD_SLEEP_CONST + prevSleepTime) {
			prevSleepTime = WORLD_SLEEP_CONST + prevSleepTime - diff;
			ACE_Based::Thread::Sleep(prevSleepTime);
		} else
			prevSleepTime = 0;

#ifdef _WIN32
		if (m_ServiceStatus == 0)
		World::StopNow(SHUTDOWN_EXIT_CODE);

		while (m_ServiceStatus == 2)
		Sleep(1000);
#endif
	}

	sScriptMgr->OnShutdown();

	sWorld->KickAll(); // save and kick all players
	sWorld->UpdateSessions(1); // real players unload required UpdateSessions call

	// unload battleground templates before different singletons destroyed
	sBattlegroundMgr->DeleteAllBattlegrounds();

	sWorldSocketMgr->StopNetwork();

	sMapMgr->UnloadAll(); // unload all grids (including locked in memory)
	sObjectAccessor->UnloadAll(); // unload 'i_player2corpse' storage and remove from world
	sScriptMgr->Unload();
}
